Add support for automated CFBL management

[Kirby]

Some users mark emails sent by XenForo as spam even though those emails are usually not spam (as they are only being as requested by the user).

Sending emails that get marked as spam does hurt sender reputation so ideally we should stop sending emails to users who mark them as spam.

While there are existing (commercial) feedback loop management services, there is nothing yet that directly integrates with XenForo so managaging such complaints currently requires manual work.

It would be great if XenForo could add support for RFC 9477 to automate complaint feedback loop management.

 

[markku]

Some users mark emails sent by XenForo as spam even though those emails are usually not spam (as they are only being as requested by the user).

Sending emails that get marked as spam does hurt sender reputation so ideally we should stop sending emails to users who mark them as spam.

While there are existing (commercial) feedback loop management services, there is nothing yet that directly integrates with XenForo so managaging such complaints currently requires manual work.

It would be great if XenForo could add support for RFC 9477 to automate complaint feedback loop management.

What are the solutions for this currently? Using something like Postmark to handle XF emails? But then we need a third party add-on so that the spam notifications are sent to XF to process? Would be good to have such an add-on if it doesn't come from core.